Thread: Error Checking for scanf

Code:

do
            {
            	printf("\n\nPlease Enter Current US Dollar Exchange Rate: \t");
            	error = scanf("%f",&USD);
                fflush(stdin);
            } 	while ( error == 0 || USD <= 0);

What Else can I add here to eliminate letters and combinations of letters and numbers? For example if i enter a number followed by a string of letters: how can i return that case as an error?

Thanks in advance,

Dave!